Drill-press.



No. 824,829. PATENTED JULY 3, 1906. P. M. STAMBAUGH.

DRILL PRESS.

APPLICATION FILED MAR. 7, 1905.

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ATT'Y's.

Witnesses F lfivsegl g f h nos 7. am au &2? c "3v/ 6- w 76M 31 v PATENTED JULY 3, 19 06. M. STAMBAUGH.

DRILL PRESS. APPLICATION FILED MAB. 7, 1905 6 SHEETS-SHEET 2.

JUV BTJbOYI Eancis M; Sbambaugh "Ill" liiL Wibnesses ATT'Y'S.

No. 824,829. PATENTED JULY 3, 1906.

F. M. STAMBAUGH.

DRILL PRESS.

APPLIOATION FILED MAR. 7, 1905.

6 SHEETS-SHEET 3.

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.PATENTED JULY 3, 1906.

F. M. STAMBAUGH.

DRILL PRESS.

APPLICATION FILED max], 1905.

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I \ll 7 1 lllllllllllllllllllllil ll IIIWHH W m G Inventor:- Stambau Wibnesses HancisM. h s mw/awi O.- WW3. $31M No. 824,829. 1 PATENTED JULY 3, 1906.

F. M. STAMBAUGH.

DRILL PRESS.

APPLICATION FILED MAR.7, 1905.

6 SHEETS-SHEET 5.

Wibnesses lnvenborz- A'r'rvs...

PATENTED JULY 8, 1906.

F. M. STAMBAUGH.

DRILL PRESS.

APPLICATION FILED MAR. 7, 1905..

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Wands v I Mfibambaugh WWW ATT'Y'S;

' UNITED STATES PATENT oFFIoE.

FRANCIS M. STAMBAUGHOF'ST. LOUIS, MISSOURL ASSIGNOR TO THE AMERICAN BRAKE COMPANY, OF ST. LOUIS, MISSOURI, A .CORPORA-- TION OF MISSOURI.

To all whom it may concern.--

Be it known that I, FRANoIs M.-STAM- BAUGH, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Drill-Presses,

of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to .the accompanying drawings, forming part of this specification, m which I Figure 1 is afront elevational view of. my improved drill-press. Fig. 2 is a side elevational view, part1 in section, of the workcarrying. table. ig. 3 is a detail view of a stop for the table. Fig. 4 is a bottom plan view of the table; Fig. 5 is a side elevational view looking from the inside of the reversing mechanism. Fi 6 is a detail view of the u per dog on the ill-shaft for actuating t e mechanism to reverse said shaft. Fig. 7 is a view of the lower dog for throwin the drilldriving mechanism out of mesh. 8 is an enlarged sectional view through t e dog,-

showing the torsionals i ring for holding the same in one position. ig. 9. isa plan view of the reversmg mechanism, the parts above the same being omitted: Fig. 10is a horizontal sectional view through the reversing mechanism. Fig. 11 is, a detail view of the dog-o erated sllde-bar. Fi 12' is a sectiona view on line 12 12 of ig..10. Fig. 13

is a sectionalview throu h the lubricantcontrolling mechanism. 1g. 14 is a side ele vational v1ew of parts of the same. Fig. 15 is a bottom plan view of said mechanism.- 16 is a detail perspective view of the d l-shaft and amodified form of slide-bar, and Fi 11 is a longitudinal sectional view throug the slide-bar.

This vention relates to anew and useful improvement in drill-presses, the object being to arrange two or more presses side by si e whereby work clam ed on a suitable table could be successivel the performance of the several operations, such as drilling and tapping, which said work undergoes.

Another objectiis to provide means, where-5 by the operator may after clampin the work' in positlon set in action certa n evices to cause the work-carrying table to progress step by step, so as to locate the work suc- Specification of Letters Patent. Application filed March 7, 1905-. Serial No. 248,854

y operated upon in DRILL-PRESS.

v Patented July 3, 1906.

cessively under the various tools de'signedto act upon the work.

' Another object is to place within easy reach of the operator controlling devices whereby one or more drill-presses may be started at the will of the operator, automatic mechanismbein rovided, so as to reverse the rotation of the Emil-Shaft to cause thesame to recede after its work is done, said shaft be-' .inlg brought to a position of rest automatic- Another object is to provide means whereby a lubricant it automatically supfilied during the time that one or more of t e tools is performing its work, said lubricant being automatically shut ofi when the drill-shaft is reversed and receding from the work.

With these objects in view the invention consists in the construction, arrangement, and combination of the several parts, all as will hereinafter be described and afterward pointed out in the claims.

In the drawings I have shown tw'o drillpresses arranged side by side, with their toolcarry'ing shafts arranged over a table common to both of them. These drill-presses are of ordinary construction and, as usual, are supported upon posts 1. Referringto Fig. 1, it will be seen that the tool-carrying shaft 2 of one of these drill-presses is rovided with an ordinary drill 3, and this s aft is thrown into gear with the drivin mechanism by means of the lever 4. 0t er mechanism common to sin 1e drill-presses is also used-to effect the fee of the shaft to cause the shaft to recede and to be brought to a position of rest. These are not shown in the accom anying drawings, as they form no part 0 my present invention.

5 indicates a work-table which, as shown in Fig. 2 is pivotally mounted in bracket extensions extendin from'the posts 1. This work-table is provided with the usual inverted-T-shaped slots for the attachment of the vise-clamps 6 for holding the work 7 position. The workin this instance is a clevis desi ed for use particularly in air-brake-slack a j iisters, and the o erations performed upon this clevis are first rilling and then tappmg. When the clamp 6 is bro. ht to the front of the machine, as shown in ig. 1, the operator adjusts the clevis in the clamp and then-tem-i porarily depresses the foot-treadle 8, which is "same to rotate until the in 9 drops into the next recess initsfat in which position the clevis to be drille is located in the proper position under the drill 3. The 0 erator now moves the-lever 4 to start the l 3 on its work and at the same time raises the rod 14 identified with the other drill-press, so as to start the tap in its work on a drill-clevis 7 which by the advance of the work-table has 7 been located thereunder. This advance of the work-table locks the finished clevis-to wit, one which has been drilled and tapped in front of the operator, who now removes the same from its clam and introduces another clevis into position in the clamp to be operated u on. While the workman is doing this drill 3 is performing its operation, and the tap is'also performing its operation, so that by the time the o iprator ad usts a new clevis into position in t e vise-clamp the work of the drill and tap has been finished and the operator may ress the foot-treadle 8 and operate the han e 11 to cause another advance of the work-table to locate the work under the respective tools to receive the above-mentioned operations.

I will now describe the automatic mechanism, which is set in operation by temporarily raising the rod 14.

15 is a tap mounted on a threaded tool-carrier the pitchof whose threads corresponds to the cutting threads on the tap. The threaded portion 16 of this tool-carrier operates through a fixed nut extending from the post 1 and effects the feed of the tap, as well as its recession, in a positive manner. This threaded tool-carrier is connected to the drill-shaft 17, which shaft, as shown in Fig. 5, has miter-gears 18 and 19 loosely mounted thereon, said gears meshing with a gear 20. Gears 18 and 19 have friction-faces and cooperate with a double-faced clutch 21, splined on the drill-shaft and moved into engagement with one or the other of the gears 18 and 19 by means of a yoke 22, pivotally mounted in the head of the drill-press and having abell-crank extension in the form of a segmental gear 23. Meshing with the se ment 23 is a segment 24, fixed to a rock-sha upon which a rock arm or lever 25 is secured. It is obvious that if this lever 25 is raised to the positionshown by the dotted lines in Fig. 5. the clutch will engage the ear 19 and rotate the drill-shaft to the rigit, causing the threaded tool-carrier to drive the tap into the clevis and cut the thread. When the lever is depressed, as shown by the dotted lines, the clutch will be moved out of engage ment with the gear 19 and into engagement with the gear 18, so that a reverse 'rotation will be imparted to the drill-shaft,.oausing the drill-tap to recede from the opening. The positive advancing drive and recession of the drill-tap is advanta eous in tapered openings, because the threads .in the opening being tapped are not mutilated, as is frequently common to hand work of this character.

Lever 25 is provided with a bearin at its end, in which is adjustabl mounted a pitman 26. This pitman is also connected to a crank-pin 27, mounted on a block 28, slidingly mounted in ways in a disk 29, said block having a threaded opening for engagin an adjusting-screw 30, whereby the throw 0 the crank-pin may be, increased or diminished. Disk 29 is provided with three recesses a, b, and c in its periphery and is con joined to a gear 31 in mesh with a inion 32, oosely mounted on a constantly-driven shaft 33. 33 receives motion through the medium of miter-gears. I

34 indicates a clutch which has sliding engagement with the hub of pinion 32 by means of suitable keys, whichinsure coincident rotation of said parts. Springs 35 tend to slide the clutch member longitudinally of shaft 33 and into engagement with a comanion clutch member 36, keyed to the end of shaft 33. The gear ratio between inion 32 and gear 31 is four to one, one revo ution of pinion 32 driving gear 31 one-quarter of a revolution.

The sliding spring-pressed clutch member 34 is provided with a cam-groove 34 in its periphery, which groove, as shown in Fig. 9, does not extend entirely around the periphery, but has its ends separated by a sto -wall 34". An arm 37 is rovided with a ro ler or pro'ection at its on designed to cooperate wit the camoove of the clutch, said arm 37 beingamem er of abell-crank lever, whose other member 38 is rovided with a projection cooperating wit the periphery of the disk 29 and the recesses therein. The rod 14,

before described, is mounted upon the outer end of this member 38.

The 0 eration of the above arts is as follows: W en rod 14 is raised, t e arm 38 lifts its projection out of the recess a, and at the same time arm 37 lifts its pro'ection out of the cam-groove, ermitting t e springs to force the sliding'c utch' member into engagement with the fixed and constantly-rotating clutch member, whereby motion is imparted, through the inion 32, to the gear 31. Rod 14 is not held in its raised position, but is instantly released, so that the'projection on arm 38 rides on the periphery of disk 29. This holds the projection of arm 37 away from the cam-groove until the crankin 27 approaches its uppermost position, (in cated by 27.) The projection on arm 38 will drop quently momentum will not carry theflp beyond the designed position, the era suming that the shaft 17 is rotating. in the proper direction and descending, the stoptation of said clutch causing the roller to engage the fluctuation in the cam-groove, which results in disengaging clutch 34 from its constantly-rotating companion 36. The parts are brought to a position of rest when the roller. on arm 37 comes in contact with the wall across the cam groove, 'and consearts i being in its highest position at the time the parts are arrested, as indicated by the dotted circles 27 In this position of the crank-pin the arm 25 is raised and the clutch 21 thrown into contact with the gear 19, so as to drive the tool-carrier and its carried tap in the proper direction.to wit, downwardlyto orm threads in the olevis.

Shaft 17 is rovided with a collar 39, preferably ad'usta ly mounted thereon and upon which col ar is mounted a spring-pressed do 40, which for the sake of distinction we wil call a stop-dog. A'bove collar 39 on shaft 17 is a similar collar 41, also adjustably -mounted on said shaft, and which'collar 41 carries a spring-pressed dog 42, which I will call a reversing-dog.

.43 indicates a slide-bar carrying a roller 44, which is located between the inclined faces of a block 45, mounted on the arm 38. Slide-bar 43 has a depending arm (see Fig. 11) to which are connected op osin springs 43, tending at all times to ho (Fsaidlmr 43 in a central position, but permitting said bar to be displaced in either direction. Suitable means are provided for regulatin the tension of these springs. As shown in ig. 11 bar 43 is also provided with a l'ateral extensionf at its endfor cooperating with the dogs. As-

dog ride idly by the'projection onbar 43 without operating said bar, and the shaft will continue to descend until the reversing-dog 42 engages the end of bar 43 and forces the same inwardly. The roller 44 will engage one of the inclines on bar 38, raising said bar,

and with it the projection, out of the recess 1).

Of course the reversing-dog 42 passes beyond the projection on bar 43, permitting said bar to return to normal position; but before this return movement the slidin clutch has been thrown into engagement wit the constantlyrotating clutch member and motion is imparted to the disk 29, so as to carry the recess b from under the projection on the bar 38. Thus when bar 38 descends its projection will ride over the disk 29 until the recess 0 is brought opposite, at which time the proj ection on bar 38 falls therein and the roller on arm 37 engages the cam-slot of the clutch and disen ages the clutch members.

It will e noted that the recesses b and c are diametrically opposite each other on the disk 29, and thus the pinion 32 makes two revolutions, causing the disk 29 to make onehalf a revolution, locating the crank-pin 27 in its lowest position, as indicated by the dotted circles 27*. In this lowest position of the crank-pin the clutch 21 is in engagement with the reversing-gear 18, and thus opposite rotation is imparted to shaft 17. In starting its u ward movement the reversing-dog rides idlyliy the projection on bar 43 and the shaft 17 continues to ascend until the stop-dog 40 engages the projection on bar 43 and moves said bar outwardly. This outward movement causes the roller 44 to ride under'the o posite inclined face of block 45 and raise t e bar 38 so as to carry its projection out of the recess 0 and the roller on arm 37 out of the cam-groove of the sliding clutch. Disk 29 is now rotated until the projection on bar 38 drops into the recess a, m which position the crankin will be, as shown in full hne's, arresting t e bar 25 in a central position and clutch 21 in a similar or neutral position between thegears 18 and 19.

Splined on the shaft 17 is a gear 46, which permits said shaft to rise and fall in its operations, but compels the rotation of said gear.

This gear meshes with a gear 47, (see Fig. 13,) Y

which gear is conjoined toa friction-disk 48. 49 indicates a companion friction-disk mounted in the hollow shaft of ear 47 the stem of said disk 49 being threa ed to-receive jamnuts cooperating with a lifting-spring 50.,-

' pipe 53 leads from a source of supply of lubricant to the valve-casing, and the pipe 54 leads from said casing to conduct the lubricant to the tap "15. 55 indicates a fixed stop having oppositely-inclined faces, with which 006 erate the inclined ends of arms 56, mounte on the' friction-disk 49, The operation of this construction is as follows: When shaft 17 is rotated to drive the tap into the work, the

ear 46 and its meshing gear 47 will of course %e correspondin ly rotated. Spring 50 has a tendency to lift iliction-disk 49 and will readily cause the inclined face of the arm 56 to ride off the fixed stop 55, so that the disk 49 will be rotateduntil the inclined face of its other arm 56 comes in contact with the op 0- site inclined face of the fixed stop 55, w en said disk 49 and its valve-rod 51 will be arrested. This position of the parts opens the valve and sup lies the lubricant through the tap. When t e shaft 17 is reversely rotated of movement 0 gear 46'will be reversed, and

consequently the disk 49 will be partially rotated in a reverse direction, so that the valve will be closed and shut off the supply of lubricant from the .tap. Y The valve remains closed until the operator again releases the rod 14 to start the tap, when the valve is o ened, said valve remaining open as long as t e tap is doing work but being shut off contemporaneously with the initial receding action of the tap and remaining closed while the tap is inactive.

In Fig. 16 I have illustrated the drill-shaft 17 with its spaced pawl-carriers 39 and 41 as cooperating with a modified form of slide-bar for governing the actuating movement of the clutch mechanism. The slide-bar 43 is illustrated as being provided with a transverse dovetailed dgroove. 57 in which is ad justably arran e a vertically-movable slide 58, carryin a ug or project on 59 to be enaged b either the pawl 40 or the awl 42.

he sli e-bar is provided with an e ongated slot 60, through which projects a bolt 61, extending throughthe slide 43 and havin on one en a thumb-nut 62, whereby the sli e 58 may be held in anyadjusted position. By providing the contactportion of the clutchactuating deviceto wit, the lug 59the collars 39 and 41 and the slide 58 maybe so adjustedas to time the actuating movement of the slide 43 so that the clutch mechanism will operate at predetermined periods.

I am aware that minor changes in the construction, arrangement, and combination of the several parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is

1. In a tapping-machine, a rotatable tapdriving shaft, and an actuatin mechanism therefor including aconstantly- 'ven driveshaft, spaced gears loose on the tap-driving shaft, a gear on the constantly-driven driveshaft constantly in mesh with said gears, a splined clutch intermediate said gears, a lever mechanism for actuating said clutch to throw it into engagement with either of said gears, a rotatable disk connected to said lever mechanism, means for rotatin it, and means for temporarily preventin t e rotation of said disk; substantially as escribed.

2. In a tapping-machine, a rotatable tapdrivin shaft, an actuating mechanism therefor inc uding a constantly-driven drive-shaft, spaced gears loose on the tap-driving shaft, a gear on the constantly-driven drive-shaft constantly in mesh with said gears, a splined clutch intermediate said gears, a lever mechanism for actuating said clutch to throw it into en agement with either of said gears, a

rotatab e disk connected to said lever mechdisk, means on the lever for permitting the anism, means for rotating said disk, means for stopping rotation of the disk, and means actuate by the rotation of the tap-driving shaft for starting rotation of the isk; substantially as described.

3. In a tapping-machine, the combination witha tap-drivin shaft, spaced gears loosely mounted on sai shaft, a clutch member splined to said shaft between the ears and movable into engagement with sac of them alternately, a lever mechanism for alternately moving1 the clutch member into enagement wit the respective gears, a disk or actuating said lever mechanism, a lever having aprojection adapted to intermittently engage with the disk to revent its rotation, a pinion for driving the 'sk, means for driving the pinion, means on the lever for causing disengagement of the pinion and its driving means when the lever engages the disk, an means for causin engagement of the pinion and its driver to drive thedisk only when the projection on said lever is out of engagement with the disk; substantially as described.

4. In a ta ping-machine, the combination with atap-diivi shaft, spaced gears loose on said shaft, a sp ed clutch member movable on said shaft and movable into frictional engagement with each of said gears alternatel means for alternately moving the clutc with the respective gears, a disk for actuatin said means, a levercarryinglmeans adapted to intermittently engage wit the disk to prevent its rotation, va pinion for driving the pinion'to drive the disk only when said ver is out of engagement with the disk, and

means for throwing the lever out of enga ev ment with said disk; substantially as scribed.

5. In a tapping-machine, the combination with a tap-driving shaft, constantly-driven spaced gears loose on the tap-driving shaft, a splined clutch member interposed between IIO the gears and. capable of engaging each of them to rotate the shaft alternately in opposite directions, mechanism for throwing the clutch into engagement with either of said gears and includin arotatable disk, means for actuating said disk comprising a shaft, a loose inion on said shaft, a clutch, one member o which is rigid with said shaft and the other with the pinion, means for connecting the inion-clutch member and the shaftclutc member, means for holding said clutch members out of engagement with each other, and for holding the disk against rotation including a lever, a sliding bar beneath the lever and having means for throwing the lever out of engagement with the disk and with the clutch member on the pinion, and means on the tap-driving shaft for actuating the sliding bar; substantially as described.

stop for arresting the movement of th valve stem friction-disk after the valve h s been opened, the movement of the shaft in the re verse direction closing said valve to out off the supply of lubricant; substantially as describe 7. In a tapping-machine, the combination with a reversible tap-driving shaft, a lubricatin -tub e adjacent to the tap ing end of the s aft, and lubricant-controlling means for automatically permitting a lubricant to flow through the tube only while the tapdriving shaft is rotating in one direction, said means comprising avalve, valve-stem and gear thereon, a spring-actuated clutch member and stop mechanism coo erating with the ta -d1iving'shaft adapte to intermittently old the gear on the valve-stem rigid therewith; substantiall as described.

8. In a'tapping-mac e, the combination with a reversible tap-driving shaft, a tube for feeding a lubricant onto the work to be tapped,

a valve for cutting off the supply of lubricant when the' tap-driving shaft is rotatin in one 1 direction, means for actuating sai valve comprising a valve-stem, a gear loose on said valve-stem, a gear on the tap-driving shaft and secured to rotate therewith, said gearbeing constantly in mesh with the loose gear on the valve-stem, a friction clutch face on the valve-stem gear, a spring-actuated friction-clutch on the valve-stem and secured to rotate therewith, said last-mentioned clutch member being adapted to hold the valvestem against rotation with res ect to the gear on the valve-stem and means or limiting the rotative motion of said valve-stem; substantially as described.

9. In a tap ing-machine, the combination with a reversi le tap-driving shaft, a tube for feedin a lubricant onto the work to be ta pe a valve for cutting off the supply of with, said gear being constantly in mesh with the loose gear on the valve-stem, a frictionclutch face on the valve-stem gear, a springactuated friction-clutch on the valve-stem and secured to rotate therewith, said lastmentioned clutch member being adapted to hold the valve-stem from rotation with respect to the valve-stem gear, means for automatically relieving frictional contact of the two clutch members, said means comprising a bracket, a rigid projection on the bracket, and projections on the valve-stem clutch for engagement with the projection on the bracket; substantially as described.

10. In atappin -machine, the combination with a reversi le tap-driving shaft. and mechanism for operating it, of a mechanism for feeding a lubricant to metal work comprising'a tube, a valve in the path of the tube,

a valve-stem, a gear loose on said valve-stem and having a clutch-face, means on the tapdriving shaft for actuating. said gear, a spring-actuated clutch member for cooperating with the clutch-face on the gear, a rigid projection on a part of the machine with which the lubricating mechanism cooperates, and. projections carried by the second-mentioned clutch member for engagement with.

the projection on the machine to move the second-mentioned clutch member out of frictional contact with the clutch member on the gear; substantially as described.

11. In a tapping-machine, the combination with a reversi mechanism for operating it, of a mechanism for feeding a lubricant to metal .work comprising a tube, a valve in the path of the tube, a valve-stem, a gear loose on said valve-stem and having a clutch-face, means on the tapdriving shaft for actuatin said gear, a spring-actuated clutch mem er for coopera tron with the clutch-face on the ear, a rojection on the machine with whic the In ricating mechanism coo crates, said projection having oppositely-inc 'ned faces, and oppositely-disposed projections carried by the this'3d day of March, 1905.

FRANCIS M. STAMBAUGH.

Witnesses: I a

EDWARD WILSON, GEORGE BAKEWELL le tap-driving shaft and. 

